package com.hch.web.admin;


import com.hch.domain.Type;
import com.hch.service.TypeService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.Pageable;
import org.springframework.data.domain.Sort;
import org.springframework.data.web.PageableDefault;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;

import javax.validation.Valid;

@Controller
@RequestMapping("/admin")
public class TypeController {

    @Autowired
    private TypeService typeService;

    //前端的页面构造好的参数会自动封装到pageable中
    @GetMapping("/types")
    public String types(@PageableDefault(size = 5, sort = {"id"}, direction = Sort.Direction.ASC)
                                Pageable pageable, Model model) {
        model.addAttribute("page", typeService.listType(pageable));
        return "admin/types";
    }

    //跳转到分类新增页面types-input.html
    @GetMapping("/types/input")
    public String input(Model model) {
        model.addAttribute("type", new Type());  //这里不是很懂为啥这样操作
        return "admin/types-input";
    }

    //修改分类信息跳转到编辑页面
    @GetMapping("/types/{id}/input")
    public String editInput(@PathVariable Long id, Model model) {
        model.addAttribute("type", typeService.getType(id));
        return "admin/types-input";
    }

    //保存分类type并返回到分类页面 @Valid校验TYPE对象
    @PostMapping("/types")
    public String post(@Valid Type type, BindingResult result, RedirectAttributes redirectAttributes) {
        Type t1 = typeService.getTypeByName(type.getName());
        if (t1 != null) {
            //数据库中已有分类记录，返回错误
            result.rejectValue("name", "nameError", "不能重复添加分类"); //field必须与实体类中定义的name保持一致
        }
        if (result.hasErrors()) {
            return "admin/types-input";
        }

        Type type1 = typeService.saveType(type);
        if (type1 == null) {
            //如果新增对象为空,失败，给个提示
            redirectAttributes.addFlashAttribute("message", "新增失败");
        } else {
            //新增成功，给个提示
            redirectAttributes.addFlashAttribute("message", "新增成功");
        }
        return "redirect:/admin/types";
    }

    //修改分类
    @PostMapping("/types/{id}")
    public String editPost(@Valid Type type, BindingResult result,@PathVariable Long id, RedirectAttributes redirectAttributes) {
        Type t1 = typeService.getTypeByName(type.getName());
        if (t1 != null) {
            //数据库中已有分类记录，返回错误
            result.rejectValue("name", "nameError", "不能重复添加分类"); //field必须与实体类中定义的name保持一致
        }
        if (result.hasErrors()) {
            return "admin/types-input";
        }

        Type type1 = typeService.updateType(id,type);
        if (type1 == null) {
            //如果更新失败，给个提示
            redirectAttributes.addFlashAttribute("message", "更新失败");
        } else {
            //更新成功，给个提示
            redirectAttributes.addFlashAttribute("message", "更新成功");
        }
        return "redirect:/admin/types";
    }

    @GetMapping("/types/{id}/delete")
    public String delete(@PathVariable Long id,RedirectAttributes attributes){
        typeService.deleteType(id);
        attributes.addFlashAttribute("message", "删除成功");
        return "redirect:/admin/types";
    }
}
